The Avatamsaka Sutra...

Studying the Avatamsaka Sutra (華嚴經) is about expanding the capacity of our minds. However, in practice, it is about opening our hearts. 

But because of the heavy weight 0f our attachments, we lose focus and forget the selfless spirit of a Bodhisattva. Selfishness fills up our hearts, leaving no space for the world. 

Our hearts are originally vast enough to encompass all the Dharma Realms. We must train our minds and hearts to stay open and practice kindness and generosity regardless of causes and conditions. Then, all universes are created and contained within our hearts, and the karmas arise accordingly.